lunar.illumination.mean {lunar}

Average Lunar Illumination

Description

Returns the average lunar illumination around specified dates.

Usage

lunar.illumination.mean(
  x,
  towards = -6,
  ...,
  by = c("date", "hours", "day", "night")
)

Arguments

x

A vector of Date values.

towards

The directed window size from x in days. By default the window looks back 7 days including x.

...

Other optional arguments are ignored.

by

The exposure interval and integration basis. The default is to represent a day's illumination by the illumination at 12 noon UT. The other options integrate midrange illuminations over hours. Options 'day' and 'night' are not currently implemented, but will be used to limit exposure intervals. The use of an unimplemented option in a function call will result in a NULL value being returned.

See Also

lunar.illumination

Examples

lunar.illumination.mean(as.Date("2004-03-24"))